JP2012240569A - Actuation decision apparatus for passenger protection control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system for preventing erroneous actuation decision of a passenger protection device.SOLUTION: An actuation decision apparatus 1 is provided with a main control unit 4 having an angle speed sensor 2 for detecting a roll angle speed in a vehicle advancing direction, and a decision circuit 3 capable of obtaining a roll angle by integrating the roll angle speed from the angle speed sensor, comparing the roll angle, the roll angle speed and a preset threshold for actuation, and generating the actuation signal of the passenger protection device. Also, the actuation decision apparatus 1 includes a horizontal acceleration sensor 5 capable of detecting acceleration in a vehicle width direction, and a horizontal accelerometer 6 capable of generating the actuation signal on the basis of the horizontal acceleration from the horizontal acceleration sensor 5. An integrator 21 for integrating the horizontal acceleration 6a is provided, and the decision circuit 3 of the main control unit 4 is configured so as to enable the temporary change of the threshold for the actuation on the basis of the integrated value 21a of the horizontal acceleration 6a from the integrator 21.

Description

  The present invention relates to an operation determination device for an occupant protection control device that can make an operation determination of an occupant protection device optimally.

  In recent years, a vehicle such as an automobile is provided with an occupant protection device for protecting the occupant in an emergency. Further, an occupant protection control device for controlling the occupant protection device is provided. The occupant protection control device includes an operation determination device for determining the operation of the occupant protection device (see, for example, Patent Document 1).

  FIG. 6 is a configuration diagram showing an operation determination device 1 of a conventional occupant protection control device.

  In this operation determination device 1, an angular velocity sensor 2 capable of detecting a roll angular velocity with respect to the traveling direction of the vehicle, a roll angle obtained by integrating the roll angular velocity from the angular velocity sensor 2, and a roll angle and a roll angular velocity are preset. A main control unit 4 is provided that includes a determination circuit 3 that can determine whether the occupant protection device is activated or deactivated by comparing with an activation threshold value and generate an activation signal.

  And a horizontal acceleration sensor 5 capable of detecting acceleration in the vehicle width direction, and a horizontal accelerometer 6 capable of generating an operation signal based on horizontal acceleration (or horizontal deceleration, the same applies hereinafter) from the horizontal acceleration sensor 5. A safing sensor unit 9 is provided.

  The safing sensor unit 9 generates an operation signal based on a vertical acceleration sensor 7 that can detect acceleration in the vertical direction and vertical acceleration (or vertical deceleration, the same applies hereinafter) from the vertical acceleration sensor 7 as necessary. It is also possible to have a vertical accelerometer 8 that can be generated.

  Further, when the operation signal from the determination circuit 3 of the main control unit 4 and the operation signal from the horizontal accelerometer 6 of the safing sensor unit 9 output the operation signals at the same time, the operation device 14 that activates the occupant protection device. An output logic unit 13 having an AND circuit 12 for outputting an operation signal is provided.

  As described above, when the safing sensor unit 9 includes the vertical acceleration sensor 7 and the vertical accelerometer 8, the output logic unit 13 further includes either the horizontal accelerometer 6 or the vertical accelerometer 8. An OR circuit 11 that outputs an operation signal when either of them generates an operation signal is provided, and the AND circuit 12 is configured such that when the determination circuit 3 of the main control unit 4 and the OR circuit 11 output the operation signal at the same time, It is comprised so that an operation signal may be outputted to actuator 14 which operates a crew member protection device.

  And the operation determination apparatus 1 of this passenger | crew protection control apparatus operate | moves as follows.

  First, in the main control unit 4, the angular velocity sensor 2 detects the roll angular velocity with respect to the vehicle traveling direction.

  The determination circuit 3 integrates the roll angular velocity from the angular velocity sensor 2 to obtain the roll angle, and compares the roll angle and the roll angular velocity with a preset operation threshold value to activate or deactivate the occupant protection device. And an operation signal is generated.

  On the other hand, in the safing sensor unit 9, the horizontal acceleration sensor 5 detects acceleration in the vehicle width direction, and the horizontal accelerometer 6 generates an operation signal based on the horizontal acceleration from the horizontal acceleration sensor 5.

  In the output logic unit 13, the AND circuit 12 outputs an operation signal to the operation device 14 when the determination circuit 3 of the main control unit 4 and the horizontal accelerometer 6 of the safing sensor unit 9 output the operation signal simultaneously. Output. As a result, the occupant protection device is activated and the occupant is protected and restrained.

  Alternatively, when the safing sensor unit 9 includes the vertical acceleration sensor 7 and the vertical accelerometer 8, the vertical acceleration sensor 7 detects acceleration in the vertical direction, and the vertical accelerometer 8 detects the acceleration from the vertical acceleration sensor 7. An actuation signal is generated based on the vertical acceleration.

  In the output logic unit 13, the OR circuit 11 outputs an operation signal when either the horizontal accelerometer 6 or the vertical accelerometer 8 generates an operation signal.

  Next, the AND circuit 12 outputs an operation signal to the operation device 14 when the determination circuit 3 of the main control unit 4 and the OR circuit 11 of the safing sensor unit 9 output the operation signal at the same time. As a result, the occupant protection device is activated and the occupant is protected and restrained.

  And the situation where an occupant protection device is operated can be roughly divided into three forms (rolling form). That is, a trip over event, a climb over event, and a fall over event. Of these, tripover events are accompanied by sudden changes in roll angular velocity, climbover events are accompanied by moderate changes in roll angular velocity, and fallover events are associated with the slowest change in roll angular velocity. It is.

  And the above-mentioned main control part 4 judges these three rollover forms comprehensively.

  The safing sensor unit 9 mainly determines a trip over event by the horizontal acceleration sensor 5 and the horizontal accelerometer 6. The vertical acceleration sensor 7 and the vertical accelerometer 8 mainly determine a climb over event and a fall over event.

  Here, as described above, since the trip over event is accompanied by a rapid change in the roll angular velocity, the operation judgment is made in comparison with other more gradual rollover modes such as a climb over event and a fall over event. Need to be accelerated.

  Therefore, the horizontal acceleration 6a from the horizontal acceleration sensor 5 of the safing sensor unit 9 or the horizontal acceleration 6a passing through the horizontal accelerometer 6 is input to the determination circuit 3 of the main control unit 4, and the horizontal acceleration 6a is determined by the determination circuit 3. When the threshold value exceeds a preset threshold value for horizontal acceleration, the threshold value for operation is lowered.

  As described above, when the horizontal acceleration 6a becomes larger than the threshold for horizontal acceleration, the operation by the main control unit 4 is performed only in the case of a tripover event highly related to the horizontal acceleration 6a by lowering the operation threshold. Judgment is accelerated.

JP 2003-112598 A

  However, when the threshold value for operation is lowered using the horizontal acceleration 6a itself, the vibration waveform 6a ′ (both amplitude waveforms) which is not related to the horizontal acceleration 6a due to the trip over event as shown in FIG. Therefore, even when the vibration waveform 6a ′ exceeds the horizontal acceleration threshold value x, the operation threshold value may be lowered, and an erroneous operation determination may be performed. Therefore, if the horizontal acceleration 6a is used as it is, there is a possibility of malfunction due to the vibration waveform 6a ', and it is difficult to further accelerate the operation judgment by lowering the horizontal acceleration threshold x. There was a problem of becoming.

  The vibration waveform 6a 'as described above is generated by a relatively large impact that does not involve deformation or permanent movement of an object, for example, when the door is suddenly closed or when the console is hit. It is. In FIG. 7, the horizontal axis represents time, and the vertical axis represents acceleration.

  Therefore, it is required to reliably eliminate the influence of the vibration waveform 6a ′ that is not related to the horizontal acceleration 6a due to the trip over event as described above.

  In order to solve the above-described problems, an operation determination device for an occupant protection control device according to the present invention includes an integrator that integrates a horizontal acceleration from a horizontal acceleration sensor of a safing sensor unit or a horizontal acceleration through a horizontal accelerometer. The determination circuit of the main control unit is characterized in that the operation threshold value can be temporarily changed based on the integrated value of the horizontal acceleration from the integrator.

  According to the present invention, the following effects can be obtained by the above-described configuration. That is, by using the integral value of the horizontal acceleration, it is possible to eliminate an erroneous operation determination that may occur when the horizontal acceleration is directly used.

It is a block diagram which shows the operation | movement judgment apparatus of the passenger | crew protection control apparatus concerning the Example of this invention. It is a graph which shows the threshold value for operation | movement, and the rollover form of a vehicle. It is a graph which shows the state which lowered | hung the threshold value for operation | movement. It is a graph which shows the mode of the horizontal acceleration by a trip over event, and the state of the integral value of the vibration waveform unrelated to this horizontal acceleration. It is a flowchart which shows the operation | movement procedure of the operation | movement judgment apparatus of FIG. It is a block diagram which shows the operation determination apparatus of the conventional passenger | crew protection control apparatus. It is a graph which shows the mode of the horizontal acceleration by a trip over event, and the state of the vibration waveform unrelated to this horizontal acceleration.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below in detail with reference to the drawings.

  <Configuration> The configuration will be described below.

  1 to 5 show this embodiment.

  An occupant protection device for protecting an occupant in an emergency is provided for a vehicle such as an automobile. In addition, an occupant protection control device for controlling the occupant protection device is provided. The occupant protection control device includes an operation determination device 1 for determining the operation of the occupant protection device.

  FIG. 1 is a configuration diagram showing an operation determination device 1 of an occupant protection control device according to this embodiment.

  In this operation determination device 1, an angular velocity sensor 2 capable of detecting a roll angular velocity with respect to the traveling direction of the vehicle, a roll angle obtained by integrating the roll angular velocity from the angular velocity sensor 2, and a roll angle and a roll angular velocity are preset. A main control unit 4 is provided that includes a determination circuit 3 that can determine whether the occupant protection device is activated or deactivated by comparing with an operation threshold value y (see FIG. 2; hereinafter the same) and generate an activation signal. .

  And a horizontal acceleration sensor 5 capable of detecting acceleration in the vehicle width direction, and a horizontal accelerometer 6 capable of generating an operation signal based on horizontal acceleration (or horizontal deceleration, the same applies hereinafter) from the horizontal acceleration sensor 5. A safing sensor unit 9 is provided.

  Further, when the determination circuit 3 of the main control unit 4 and the horizontal accelerometer 6 of the safing sensor unit 9 simultaneously output an operation signal, an AND circuit that outputs the operation signal to the operation device 14 that operates the occupant protection device. 12, an output logic unit 13 is provided.

  Here, the vehicles are mainly intended for passenger cars, but in addition, various vehicles such as commercial vehicles, buses, trucks, construction vehicles, and agricultural vehicles may be widely included. The occupant protection device may be an airbag device, a seat belt restraint device, or the like. When the occupant protection device is an airbag device, the actuating device 14 is an ignition device. Further, the operation determination device 1 except for sensors such as the angular velocity sensor 2, the horizontal acceleration sensor 5, and the vertical acceleration sensor 7 to be described later may be configured by hardware or software.

  In addition to the overall configuration as described above, the present embodiment has the following configuration.

(Configuration 1)
An integrator 21 (trip over detection integrator) for integrating the horizontal acceleration from the horizontal acceleration sensor 5 or the horizontal acceleration 6a passing through the horizontal accelerometer 6 is provided. Then, the determination circuit 3 of the main control unit 4 can temporarily change the operating threshold value y based on the integrated value 21a of the horizontal acceleration 6a from the integrator 21 (see the changed operating threshold value y ′ in FIG. 3). Configured.

  Here, when the horizontal acceleration from the horizontal acceleration sensor 5 is used, there is an advantage that the detected raw data can be directly used without a time lag. Further, when the horizontal acceleration 6a passing through the horizontal accelerometer 6 is used, there is an advantage that the raw accelerometer 6 can process and use the raw data by passing it through a noise filter or the like. The integrator 21 may have an internal configuration or an external configuration of the determination circuit 3.

(Configuration 2)
More specifically, the determination circuit 3 of the main control unit 4 compares the integral value 21a of the horizontal acceleration 6a from the integrator 21 with a preset integral value threshold value z (see FIG. 4) to determine the horizontal level. When the integral value 21a of the acceleration 6a exceeds the integral value threshold value z, the operation threshold value y is temporarily reduced (see the modified operation threshold value y ′ in FIG. 3) (see the flowchart in FIG. 5). .

(Configuration 3)
In the above description, the safing sensor unit 9 can detect the acceleration in the vertical direction, and the vertical acceleration sensor 7 can generate an operation signal based on the vertical acceleration (or vertical deceleration, the same applies hereinafter) from the vertical acceleration sensor 7. An accelerometer 8.

  The output logic unit 13 includes an OR circuit 11 that outputs an operation signal when either the horizontal accelerometer 6 or the vertical accelerometer 8 generates an operation signal. Further, the AND circuit 12 is configured to output an operation signal to the operation device 14 that operates the occupant protection device when the determination circuit 3 of the main control unit 4 and the OR circuit 11 simultaneously output the operation signal. .

  <Operation> The operation of this embodiment will be described below.

  The operation determination device 1 of the occupant protection control device operates as follows.

  As shown in FIG. 1, first, in the main control unit 4, the angular velocity sensor 2 detects a roll angular velocity with respect to the vehicle traveling direction.

  Then, the determination circuit 3 integrates the roll angular velocity from the angular velocity sensor 2 to obtain the roll angle, and compares the roll angle and the roll angular velocity with a preset operation threshold value y to activate or deactivate the occupant protection device. The operation is judged and an operation signal is generated.

  Here, FIG. 2 is a graph showing the threshold value for operation y. In this case, the horizontal axis is the roll angle, and the vertical axis is the roll angular velocity. The threshold y for operation is, for example, a boundary line connecting the value of the roll angular velocity that should be determined as the operation when the roll angle is 0 and the value of the roll angle that should be determined as the operation when the roll angular velocity is 0. Has been. Then, the upper side of the operating threshold value y is an operating region, and the lower side of the operating threshold value y is a non-operating region.

  On the other hand, as shown in FIG. 1, in the safing sensor unit 9, the horizontal acceleration sensor 5 detects acceleration in the vehicle width direction, and the horizontal accelerometer 6 operates based on the horizontal acceleration 6 a from the horizontal acceleration sensor 5. Is generated. For example, the horizontal acceleration 6a is compared with a preset horizontal acceleration threshold value to determine whether the occupant protection device is activated or deactivated, and an activation signal is generated.

  In the output logic unit 13, the AND circuit 12 outputs an operation signal to the operation device 14 when the determination circuit 3 of the main control unit 4 and the OR circuit 11 of the safing sensor unit 9 output the operation signal at the same time. To do. As a result, the occupant protection device is activated and the occupant is protected and restrained.

  Alternatively, as described above, when the safing sensor unit 9 includes the vertical acceleration sensor 7 and the vertical accelerometer 8, the vertical acceleration sensor 7 detects acceleration in the vertical direction at the safing sensor unit 9. The vertical accelerometer 8 generates an actuation signal based on the vertical acceleration from the vertical acceleration sensor 7.

  In the output logic unit 13, the OR circuit 11 outputs an operation signal when either the horizontal accelerometer 6 or the vertical accelerometer 8 generates an operation signal.

  Next, the AND circuit 12 outputs an operation signal to the operation device 14 when the determination circuit 3 of the main control unit 4 and the OR circuit 11 of the safing sensor unit 9 output the operation signal at the same time. As a result, the occupant protection device is activated and the occupant is protected and restrained.

  And the situation where an occupant protection device is operated can be roughly divided into three forms (rolling form). That is, a tripover event A, a climbover event B, and a fallover event C as schematically illustrated in FIG. However, although not specifically described, there are several forms other than the above.

  Of the above, tripover event A is accompanied by a sudden change in roll angular velocity, climbover event B is accompanied by a moderate change in roll angular velocity, and fallover event C is the slowest roll. It involves changes in angular velocity. In a more easy-to-understand example, the trip over event A is, for example, a case where a vehicle traveling at a high speed slips on a curve, then hits a curb and rolls over vigorously. Is, for example, a case where the vehicle rolls over after it rides on a curb or a guardrail, and then falls over. For example, a fallover event C occurs when a vehicle that is slowly traveling on a bank or the like For example, it may roll over while sliding along. However, the description for each event is merely a typical example, and is not limited to the above example.

  And the above-mentioned main control part 4 judges these three rollover forms comprehensively.

  The safing sensor unit 9 mainly determines a trip over event A by the horizontal acceleration sensor 5 and the horizontal accelerometer 6. Further, the climb-over event B and the fall-over event C are mainly determined by the vertical acceleration sensor 7 and the vertical accelerometer 8.

  Here, as described above, since the trip over event A is accompanied by a rapid change in the roll angular velocity, it is compared with other more gradual rollover events such as the climb over event B and the fall over event C. It is necessary to speed up the operation judgment.

  Therefore, as shown in FIG. 3, the determination circuit 3 lowers the operation threshold y only in the case of the trip over event A (the operation threshold y is changed to the operation threshold y ′ after the change). ) Things are done. Accordingly, it is possible to accelerate the operation determination by the main control unit 4 only in the case of the trip over event A.

  FIG. 3 is a graph showing a state in which the operating threshold value y is lowered to the changed operating threshold value y ′. In this case, the horizontal axis is the roll angle, and the vertical axis is the roll angular velocity.

  However, when the operating threshold value y is lowered, the operating threshold value y is not inadvertently lowered by a vibration waveform 6a ′ that is not related to the horizontal acceleration 6a due to the trip over event A as shown in FIG. It is necessary to do so. Such a vibration waveform 6a ′ is generated by a relatively large impact that does not involve deformation or permanent movement of an object, for example, when the door is suddenly closed or when the console is hit.

  Therefore, in this embodiment, the integrator 21 shown in FIG. 1 integrates the horizontal acceleration 6a from the horizontal accelerometer 6 of the safing sensor unit 9, and the judgment circuit 3 of the main control unit 4 The threshold value for operation y is temporarily changed based on the integral value 21a of the horizontal acceleration 6a (operation of Configuration 1).

  Here, the control using the integrated value 21a of the horizontal acceleration 6a can be used to lower the operating threshold value y as described above, and conversely, can be used to increase the operating threshold value y. it can.

  However, in this case, for the purpose of accelerating the operation determination with respect to the trip over event A, the determination circuit 3 of the main control unit 4 determines that the integral value 21a of the horizontal acceleration 6a is an integral value threshold, as shown in FIG. The configuration is such that the operating threshold value y is lowered when z is exceeded (operation of Configuration 2).

  In this way, by using the integral value 21a of the horizontal acceleration 6a, in the case of the trip over event A, the integral value 21a becomes larger, so that the integral value threshold value z can be exceeded. In the case of the vibration waveform 6a ′ (both amplitude waveforms) unrelated to A, the integral value 21a ′ does not increase, and thus the integral value threshold value z cannot be exceeded. And a simple vibration waveform 6 a ′ (both amplitude waveforms) that are not related to the tripover event A can be distinguished. In FIG. 4, the horizontal axis represents time, and the vertical axis represents the integrated value of acceleration. Therefore, malfunction due to the vibration waveform 6a ′ can be eliminated, and the threshold for horizontal acceleration x can be made lower to further speed up the operation determination.

  FIG. 5 is a flowchart showing a procedure for lowering the actuation threshold y. According to this, first, in step 1 (s1: start of integration calculation), the integrator 21 obtains the integral value 21a of the horizontal acceleration 6a, and in step 2 (s2), the determination circuit 3 of the main control unit 4 determines the horizontal acceleration 6a. It is monitored whether or not the integral value 21a exceeds the integral value threshold value z (input integral value <integration judgment TH / L), and when the integral value 21a of the horizontal acceleration 6a exceeds the integral value threshold value z, step 3 (s3 : The threshold value is changed to the angular velocity set value after the change), and the determination circuit 3 of the main control unit 4 decreases the operation threshold value y.

  Although the integration value threshold z by the integrator 21 may be constantly monitored as described above, the level of the horizontal acceleration 6a is monitored by the horizontal accelerometer 6 monitoring the level of the horizontal acceleration 6a. Only when the monitoring threshold value is exceeded, the integration value threshold value z may be monitored by the integrator 21.

  <Effect> According to this embodiment, the following effects can be obtained.

  (Effect 1) Since the operation threshold value y of the determination circuit 3 of the main control unit 4 is changed based on the integral value 21a of the horizontal acceleration 6a, the trip over event A having a high relation with the horizontal acceleration 6a is obtained. Only in this case can the timing of the operation determination by the main control unit 4 be optimized. That is, it is possible to make an optimum operation determination according to the situation. For example, if the operation threshold y is lowered, the operation judgment by the main control unit 4 can be accelerated, and conversely, if the operation threshold y is raised, the operation judgment by the main control unit 4 is made accurate. can do.

  Further, by temporarily changing the operation threshold y, the operation stability of the operation determination device 1 can be maintained while minimizing the influence of the change of the operation threshold y. That is, it is possible not to affect the operation determination of the climb over event B or the fall over event C other than the trip over event A.

  Then, since the integral value 21a of the horizontal acceleration 6a is used for changing the operation threshold y, the horizontal acceleration 6a caused by the trip over event A, which occurs when the horizontal acceleration 6a is used directly, It is possible to reliably eliminate an error in the operation determination due to the irrelevant vibration waveform 6a '(both amplitude waveforms).

  (Effect 2) By reducing the operation threshold value y when the integral value 21a of the horizontal acceleration 6a exceeds the integral value threshold value z, mainly only for the trip over event A highly related to the horizontal acceleration 6a. Thus, the operation determination by the main control unit 4 can be accelerated.

(Effect 3)
The safing sensor unit 9 includes a vertical acceleration sensor 7 that can detect acceleration in the vertical direction, and a vertical accelerometer 8 that can generate an actuation signal based on the vertical acceleration from the vertical acceleration sensor 7. The output logic unit 13 has an OR circuit 11 that outputs an operation signal when either one of the horizontal accelerometer 6 and the vertical accelerometer 8 generates an operation signal, and the AND circuit 12 is determined by the main control unit 4. Since the circuit 3 and the OR circuit 11 are configured to output the operation signal to the operation device 14 that operates the occupant protection device when the operation signal is output at the same time, in addition to the trip over event A, the climb over It becomes possible to make an operation judgment between the event B and the fallover event C.

  Although the embodiments of the present invention have been described in detail with reference to the drawings, the embodiments are only examples of the present invention, and the present invention is not limited to the configurations of the embodiments. Needless to say, design changes and the like within a range not departing from the gist of the invention are included in the present invention. Further, for example, when each embodiment includes a plurality of configurations, it is a matter of course that possible combinations of these configurations are included even if not specifically described. Further, when a plurality of embodiments and modifications are shown, it is needless to say that possible combinations of configurations extending over these are included even if not specifically described. Further, the configuration depicted in the drawings is of course included even if not particularly described. Further, when there is a term of “etc.”, it is used in the sense that the equivalent is included. In addition, when there are terms such as “almost”, “about”, “degree”, etc., they are used in the sense that they include those in the range and accuracy recognized by common sense.

DESCRIPTION OF SYMBOLS 1 Operation | movement determination apparatus 2 Angular velocity sensor 3 Judgment circuit 4 Main control part 5 Horizontal acceleration sensor 6 Horizontal accelerometer 6a Horizontal acceleration 7 Vertical acceleration sensor 8 Vertical accelerometer 9 Safe sensor part 11 OR circuit 12 AND circuit 13 Output logic part 14 Operation | movement Device 21 Integrator 21a Integral value y Threshold for operation y ′ Threshold for operation after change z Threshold for integral value

Claims (3)

An angular velocity sensor capable of detecting a roll angular velocity relative to the vehicle traveling direction;
The roll angular velocity from the angular velocity sensor is integrated to obtain the roll angle, and the roll angle and the roll angular velocity are compared with a preset operation threshold value to determine whether the occupant protection device is activated or deactivated. A main control unit having a determination circuit capable of generating a signal;
A horizontal acceleration sensor capable of detecting acceleration in the vehicle width direction;
A safing sensor unit having a horizontal accelerometer capable of generating an actuation signal based on a horizontal acceleration from the horizontal acceleration sensor;
Output logic having an AND circuit that outputs an operation signal to an operation device that operates an occupant protection device when the determination circuit of the main control unit and the horizontal accelerometer of the safing sensor unit simultaneously output the operation signal And an operation determination device for an occupant protection control device comprising:
An integrator for integrating horizontal acceleration from the horizontal acceleration sensor of the safing sensor unit or horizontal acceleration through a horizontal accelerometer;
An operation determination device for an occupant protection control device, wherein the determination circuit of the main control unit is configured to be able to temporarily change the operation threshold based on an integrated value of horizontal acceleration from the integrator.   The determination circuit of the main control unit compares the integral value of the horizontal acceleration from the integrator with a preset threshold value for the integral value, and when the integral value of the horizontal acceleration exceeds the integral value threshold value, 2. The operation determination device for an occupant protection control device according to claim 1, wherein the operation threshold value is temporarily lowered. The safing sensor unit is capable of detecting acceleration in the vertical direction, and a vertical acceleration sensor;
A vertical accelerometer capable of generating an actuation signal based on the vertical acceleration from the vertical acceleration sensor;
The output logic unit includes an OR circuit that outputs an operation signal when either the horizontal accelerometer or the vertical accelerometer generates an operation signal;
The AND circuit is configured to output an operation signal to an operation device that operates an occupant protection device when the determination circuit of the main control unit and the OR circuit simultaneously output an operation signal. An operation determination device for an occupant protection control device according to claim 1 or 2.